The Seal,mating Ring Ro, cataloged under National Stock Number 5330-00-138-4084, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Rolls-Royce Corporation. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Seal,mating Ring Ro |
| FSC / FSG | 5330 — Packing and Gasket Materials (FSG 53) |
| Manufacturers | Extex, Ltd. (CAGE 06QZ8); Extex Engineered Products Inc Dba Timken Aerospace Services (CAGE 1L9D9); Rolls-Royce Corporation (CAGE 63005); Technetics Group Chicago Llc (CAGE 09456) |
| Parameter | Value |
|---|---|
| NSN | 5330-00-138-4084 |
| Primary Part Number | 6875491 |
| Item Name | Seal,mating Ring Ro |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Rolls-Royce Corporation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Part Number | Manufacturer |
|---|---|
| E6875491 | Extex, Ltd. (USA) |
| E6875491 | Extex Engineered Products Inc Dba Timken Aerospace Services (USA) |
| 6875491 PRIMARY | Rolls-Royce Corporation (USA) |
| 6875491 | Technetics Group Chicago Llc (USA) |
| Reference | Meaning |
|---|---|
| 6875491 | 5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
| 6875491 | 5/9 Secondary reference Extex Engineered Products Inc Dba Timken Aerospace Services |
| 6875491 | 5/9 Secondary reference Extex, Ltd. |
NSN 5330-00-138-4084 is a Seal,mating Ring Ro, manufactured by Rolls-Royce Corporation, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-138-4084 has 4 manufacturer part numbers on file: E6875491 (Extex, Ltd.), E6875491 (Extex Engineered Products Inc Dba Timken Aerospace Services), 6875491 (Rolls-Royce Corporation), 6875491 (Technetics Group Chicago Llc).
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.